Timing based UUIDs (type 1) or ULIDs can leak (surprise!) timing information. If you can see them then you can infer the rate at which some resource is being cr

Timing based UUIDs (type 1) or ULIDs can leak (surprise!) timing information. If you can see them then you can infer the rate at which some resource is being created. For example the rate at which a service is creating users or business transactions. This can be valuable competitive information you don't want to share with the world.